How do thermal printers work? There are two ways by which the thermal printing process operates, but they have only one main component, which is heat. In older machines, the thermal printing process requires the use of heat-sensitive paper. A roll of such paper is placed in a container provided in the machine, with the end of the roll fed into a slot.
The thermal printing process used in newer thermal printer models is slightly different in that they now require ribbon cartridges. In this modified thermal printing process, the ribbon cartridge that contains ink with the consistency of crayon or wax is inserted into the printer. Whenever the thermal printer is used, paper is fed into the slot between the printer head and the platen roller. Upon application of heat, the ink in the ribbon cartridge melts and sticks onto the paper.
Though thermal printers are considered to be special use printers, there are a number of advantages that can be had by using them. Foremost of these advantages is that thermal printers are relatively inexpensive. They are also, by far, very easy to use. Most thermal printers do not require a lot of brainwork; they just require pushing a few buttons.
Some users, however, believe that the advantages that thermal printers have are terribly outweighed by their disadvantages. As inexpensive as the thermal printer is, it is not as efficient in using ink. The thermal printer is highly dependent on heat and if the printer head is too hot, too much ink will be transferred to the paper.
This then leads to the second problem users have with thermal printers: they often have smudgy outputs. This can be observed most especially when the ink is still wet. The ink can also react to the heat of one's fingers when skin comes in contact with the paper, or when something heavy touches the paper. The image becomes smudged and blurred upon contact.
Color is also a limitation with thermal printers. Thermal printers use carbon pigmented ink, and pigmented ink is not really optimal for colors. The machines that do produce colors make use of wax-based inks rather than pigmented inks.
Lastly, thermal printers require constant maintenance. The heat makes the printer head vulnerable to damage. Regular repairs made to the printer head can be costly and a drain to one's pocket. And this is probably the one reason why thermal printers are special use printers.
It is one of those things that most of us really don't think about. How does a laser printer work? Well, you click ?print? and it works, right? For most of us that is all we need to know or would care to know. But, in reality, it is something you should an understanding of if you are going to be buying a laser printer for the office network or shelling out a decent amount of cash.
Chemistry isn't that bad
Most people have horror stories about chemistry class, me included. But when it comes to figuring out how a laser printer and chemistry work together it is not all that bad. Whether it is a HP, Epson, Cannon or Dell laser printer it works the same way, positive charges and negative charges. The old saying actually applies, opposites attract.
Getting charged
Within the laser printer there is a drum that slowly turns. As it turns it is given a charge by a wire (charge corona wire) or, in some cases, another roller. After the drum is charged the printer shoots a laser at the surface of the drum discharging the drum in certain places. These places end up looking like letters and numbers on the drum.
To get these discharged letters and number shapes off the drum and onto a piece of paper the laser printer covers the discharged shapes with charged toner. It then hooks them up with an oppositely charged piece of paper. As makes sense the toner is attracted to the paper and there it is, toner on paper. If you have ever changed a toner cartridge you can attest that the stuff loves to attach itself to just about anything. The process so far just makes the toner attach itself in an ordered fashion or letter and numbers.
Getting toned
The process is just about complete at the most basic level. What needs to happen to finish off the process is for the toner to be fused into the paper permanently. To accomplish this the laser printer rolls the paper by a heat roller to melt the toner into the fibers of the paper. As the laser printer does this it real eases the charge with yet another roller.
Ultimately, when the process is in synch there is no muss and no mess. But everything needs to be timed just right. In the end, there is a warm static free piece of paper with all the words fit and unfit to print.
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